Stitch-picking device



Oct. 4, 1927.

o. PETERSON Filed Feb; 20.l 1926 D. Farmsum attenua Patented Oct. 4, 1927.

OLE PETERSON, OF CLEVELAND, OHIO.l

STITCH-morzine DEVICE.

Application led February 20, 1926. Serial No.189,525.

My invention relates to an improvement in stitch pickers, my object in general belng toV provide Va rotary tool for shoe finishing or repairing machines, whereby the stitches in the sole of a shoe may be picked cleanly and rapidly without injury to the welt or shoe upp-er, preparatory to repairing or resoling operations.

In the accompanying drawings, Fig. 1 is a fronty elevation on a reduced scale, of a shoe finishing machine having my improved stitch picking tool afxed to a spindle or kshaft therein. Fig. 2 is an enlarged elevation, and Fig. 3 a sectional view, of my .rotary picker and a shoe. Fig. 4 is a sectional detail of `a part of the picker, on a larger scale than actual size; and Fig. 5 is a similar view of a modification.

As a preliminary step in renewing a 20 stitched 'sole the stitches which secure the welt and sole together are first cut by inserting a knife between the welt 2'and sole 3. The loop stitches S in the welt may then be picked out by pressing4 the welt upwardly against the periphery of my. rotary picker A while shifting or turning the shoe along the line of stitches in the welt.' Picker A comprises a metal disk having a fiat inner side 4, a reduced round hub 5, and a conical outer side or surface 6 curving on concave lines toward fiat side 4 to produce a narrow orA relatively sharp peripheral edge 7 A central opening 8 extends through hub 5, and this opening may contain a spiral groove or screw-thread 9 whereby the disk may be lse.-

cured to the screwthreaded extremity or spindle 1() of a rotatable shaft 11, such for example, asused in a shoe finishing machine B of the type delineated in Fig. 1. Con-A caved surface 6 permits the sewed portion 12 of the shoe upper 14 to be brought very closely to peripheral edge and accordingly this edge may be caused tofbear rotatably against-.welt 2 at an intermediate point between the outer stitches S for sole 3 and the sewed portion 12 of the upper. .In this way the upper may be pressed back or away from stitches S and pressure brought to bearuon the welt by peripheral edge 7, it being understood that the welt and sole, as well as the upper are yielding andfiexible in varying,Vv

As a result the stitches S are.

degree. brought into contact with a lseries of picking yteeth 15 forming part of a flat ratchet plate 16 sleeved over hub 5 and detachably secured `55 to flat side 4 by screws 17. lTeeth 15 are v A angular or like ratchet teeth, except that the transverse scraping or picking edge 18V of each tooth is curved and.' slants away from peripheral edge 7 toward the axis of the 60 tool. A rounded corner or point 19 Vmay also be formed in each tooth 15 contiguous to the periphery or circular edge 7 so that no sharp cutting edges may be present in pressing the welt toward the rapidly revolving teeth which pick out the stitches successively as the shoe is pressed in running engagement Vwith the disk or wheel.

In Fig. 5 I show a. series of th-in ratchet plates 2O of different diameters having cor- 70 responding picking teeth 15 in stepping re'- lation, together with va clamping'plate 21 and a clamping screw 22` extending through curved slots 23 inthe plates. In this form of the device the platesor laminations 20' 75.

may be variously assembled to change the outline of the picking edge, formed by the contiguous teeth. The curved slot-s 23 in the plates are concentric withthe axis, and therefore variable radial settings of the ref' spective plat-es 'and their teeth lmay also be f obtained.

What'I claim, is: 1

1. A .stitch pickingfdevice,y comprising a metal disk having a round `hub portion adapted to be connected'detachably to a rotatable shaft, one side of said disk being of conical form curved on concave lines andV the opposite side being flat to forma iiange` of gradually tapering thickness terminating 90,. in a narrow peripheral-bearingand guardling edge, and a flat ring-shaped plate sleeved f .n shaped plates of different diameter arranged in stepped .relation to form` stepped, picking edges. y

Intestimony whereof `I affix myy signa-y ture. 'OLE PETERSON. 

